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[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings d
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From: |
Shesha Sreenivasamurthy |
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Subject: |
[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot |
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Date: |
Fri, 15 Jan 2016 12:12:43 -0800 |
Problem:
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If a guest has vhost-user enabled, then on reboot vhost_virtqueue_stop
is invoked. This unmaps vring memory mappings. However, it will not give
any indication to the underlying DPDK slave application about it.
Therefore, a pollmode DPDK driver tries to read the ring to check for
packets and segfaults.
Solution:
----------
VHOST_USER_RESET_OWNER API is issued by QEMU so that DPDK slave
application is informed that mappings will be soon gone so that
it can take necessary steps.
Shesha Sreenivasamurthy (1):
vhost-user: Slave crashes as Master unmaps vrings during guest reboot
hw/virtio/vhost.c | 5 +++++
1 file changed, 5 insertions(+)
--
1.9.5 (Apple Git-50.3)